India is a land of innovations and inventors. From the metric numbering system of all the numbers, including zero, its calendar system including a week and names of days similar to the Greek-Roman system of naming days, to Chess, Ruler (scale), Diamonds, Shampoo, Flush Toilet, Indigo dye, Ink, Ancient Dentistry, Binary Code, Algebraic Abbreviations, Decimal Mark, Fibonacci Numbers, Cotton Cultivation,